CN215962971U - Printing exhaust gas purification system - Google Patents
Printing exhaust gas purification system Download PDFInfo
- Publication number
- CN215962971U CN215962971U CN202122186940.2U CN202122186940U CN215962971U CN 215962971 U CN215962971 U CN 215962971U CN 202122186940 U CN202122186940 U CN 202122186940U CN 215962971 U CN215962971 U CN 215962971U
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- Prior art keywords
- catalysis
- tank
- box
- purification system
- printing
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- 238000000746 purification Methods 0.000 title claims abstract description 24
- 239000002912 waste gas Substances 0.000 claims abstract description 49
- 239000007789 gas Substances 0.000 claims abstract description 48
- 238000010521 absorption reaction Methods 0.000 claims abstract description 45
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 37
- 238000001179 sorption measurement Methods 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 239000003463 adsorbent Substances 0.000 claims abstract description 6
- 230000003197 catalytic effect Effects 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 12
- 238000005273 aeration Methods 0.000 claims description 5
- 230000001699 photocatalysis Effects 0.000 claims description 5
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 239000011247 coating layer Substances 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 3
- 241001465382 Physalis alkekengi Species 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to the technical field of waste gas treatment, in particular to a printing waste gas purification system which comprises a gas collecting hood, a catalysis box, an absorption tank and an adsorption tank which are sequentially connected, wherein the gas collecting hood is communicated with the catalysis box through a first communicating pipe, the catalysis box is in a polygon prism shape, a plurality of groups of catalysis lamps are arranged on the catalysis box, the catalysis lamps are in a strip shape, extend along the length direction of the polygon prism and are all arranged on the edges of the polygon prism, a plurality of catalysis plates are uniformly arranged inside the catalysis box at intervals, the catalysis box is communicated with the absorption tank through a second communicating pipe, a spraying mechanism is arranged in the absorption tank, the absorption tank is connected with the adsorption tank through a third communicating pipe, and a tail gas adsorbent is filled in the adsorption tank. Printing exhaust gas purification system can carry out purification treatment to printing exhaust gas, and the treatment cost is lower and higher to the pollutant absorption rate in the exhaust gas, can reduce environmental pollution effectively.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment, in particular to a printing waste gas purification system.
Background
The waste gas components of the printing production workshop mainly comprise waste gas toluene, benzene, ethyl acetate, butyl acetate, No. 200 solvent oil, ethanol, butanol and the like generated by the printing ink solvent. The source and emission pattern of the waste gas from different printing processes is essentially the same: the waste gas comes from the used ink and diluent (the printing airtight stock needs to be added with the diluent, such as metal printing and plastic printing), the adhesive for compounding (only limited to part of printing enterprises with compounding process) and the equipment cleaning agent, and possible discharge routes are as follows: solvent volatilization in the ink mixing process, solvent volatilization in the printing process, a drying stage, a compounding process, an equipment cleaning process and the like. The total content of volatile components emitted by the ink accounts for 70-80%, and a large amount of ethanol, ethyl acetate, butyl acetate, propyl acetate, toluene, xylene and other organic gases are volatilized and discharged. The printing waste gas has complex components, heavy peculiar smell, flammability and explosiveness, and the waste gas is relatively large to the surrounding environment after being discharged without purification. The prior printing waste gas treatment method has the problems of longer path, poor treatment effect and higher cost.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, an object of the present invention is to provide a printing waste gas purification system, which can purify printing waste gas, has a low treatment cost, has a high absorption rate of pollutants in the waste gas, and can effectively reduce environmental pollution.
In order to achieve the technical effect, the utility model adopts the following technical scheme:
the utility model provides a printing exhaust gas purification system, is including gas collecting channel, catalysis case, absorption tank and the adsorption tank that connects gradually, the gas collecting channel through first communicating pipe with catalysis case intercommunication, the catalysis case is the polygon prism shape just be equipped with multiunit catalysis lamps and lanterns on the catalysis case, catalysis lamps and lanterns are rectangular shape and follow the length direction of polygon prism extends and all locates on the edge of polygon prism, the inside interval of catalysis case is equipped with a plurality of catalysis boards uniformly, the outside of catalysis board all coats and has the photocatalysis dope layer, the catalysis case pass through second communicating pipe with the absorption tank intercommunication, be equipped with in the absorption tank and spray the mechanism, the absorption tank is connected with the adsorption tank through third communicating pipe, the adsorption tank intussuseption is filled with the tail gas adsorbent.
Further, the cross section of the catalytic box is a regular hexagon or a regular octagon.
Further, the catalysis case includes the box, all be equipped with the inserting groove on the edge of box, the inboard of inserting groove is equipped with the light-passing board, the catalysis lamp includes lamp body, mount pad and plugboard, the mount pad with plugboard fixed connection, just the lamp body with mount pad threaded connection or grafting, be equipped with the spout on the lateral wall of inserting groove, plugboard slidable mounting in the spout.
Furthermore, the absorption tank is cylindrical, a liquid collecting tank is arranged at the bottom of the absorption tank, an air inlet main pipe is arranged in the liquid collecting tank, an air inlet end of the air inlet main pipe is communicated with the second communicating pipe, an air outlet end of the air inlet main pipe is connected with an air inlet branch pipe, the air inlet branch pipe is annular and clings to the inner wall of the absorption tank, and a plurality of aeration heads are further arranged on the air inlet branch pipe.
Furthermore, still be equipped with a plurality of spoilers in the adsorption tank, be parallel to each other between the spoilers and the spoilers is located the top of inlet branch.
Further, the spraying mechanism comprises an annular spraying pipeline, a plurality of spraying heads are arranged on the annular spraying pipeline, a liquid supply pipe is further arranged on the spraying pipeline, and the liquid inlet end of the liquid supply pipe is arranged at the bottom of the liquid collecting tank and communicated with the liquid collecting tank.
Furthermore, an adsorption component is arranged in the gas collecting hood.
Further, be equipped with step-like mount pad in the gas collecting channel, adsorption component is including being discoid metal basket, the inside packing of metal basket has the filter pulp, still be equipped with the connection otic placode on the metal basket, the connection otic placode pass through the bolt with gas collecting channel fixed connection.
Compared with the prior art, the utility model has the beneficial effects that: according to the printing waste gas purification system provided by the utility model, through the gas collecting hood, the catalysis box, the absorption tank and the adsorption box which are sequentially arranged, when the printing waste gas is treated, the printing waste gas is firstly collected through the gas collecting hood, solid particles in the printing waste gas are intercepted, most organic matters in the waste gas are subjected to catalytic oxidation through the catalysis box, and the printing waste gas which is not completely catalyzed and catalytic products of the printing waste gas are absorbed again through the absorption tank, so that the organic matters in the printing waste gas are completely decomposed and absorbed, and the treatment efficiency of the printing waste gas is improved. Finally, the escaped gas in the absorption tank is adsorbed again through the adsorption box, so that the printing waste gas can be further ensured to be completely treated, and the treated tail gas can completely reach the emission standard.
Drawings
Fig. 1 is a schematic diagram illustrating an overall structure of a printing waste gas purification system according to an embodiment of the present invention;
fig. 2 is a partial enlarged structural view of a printing exhaust gas purification system according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an overall structure of a catalyst box of a printing exhaust gas purification system according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a catalytic box of a printing exhaust gas purification system according to an embodiment of the present invention;
fig. 5 is a partial enlarged structural view of a printing waste gas purification system according to an embodiment of the present invention at a position B;
the reference signs are: 10, a gas collecting hood, 11, a connecting lug plate, 12, a metal basket, 121, filter cotton, 13, a first connecting pipe, 20, a catalytic box, 21, a second connecting pipe, 22, a catalytic plate, 23, a plugging groove, 24, a lamp body, 241, a mounting seat, 242, a plugging plate, 30, an ozone conveying pipe, 31, an ozone generator, 40, an absorption tank, 41, a third connecting pipe, 42, an air inlet manifold, 421, an air inlet branch pipe, 422, an aeration head, 43, a flow baffle, 44, an annular spraying pipeline, 441, a spray head, 45, a liquid supply pipe, 451, a circulating pump, 50, an adsorption box, 51 and a tail gas adsorbent.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 5, the printing waste gas purification system provided by this embodiment includes a gas collecting hood 10, a catalytic tank 20, an absorption tank 40, and an absorption tank 50, which are connected in sequence, where the gas collecting hood 10 is used to collect and filter printing waste gas, the gas collecting hood 10 is communicated with the catalytic tank 20 through a first communication pipe 13, the catalytic tank 20 is communicated with the absorption tank 40 through a second communication pipe 21, and the absorption tank 40 is communicated with the absorption tank 50 through a third communication pipe 41. In specific implementation, the gas collecting channel 10 is used for absorbing gas, the catalytic box 20 degrades and converts the printing waste gas into low molecular compounds, water and carbon dioxide by decomposing and oxidizing the industrial waste gas with the ultraviolet light beams, and then absorbs the undegraded pollutants again through the absorption tube, and finally, the pollutants are discharged after being adsorbed by the adsorption box 50, so that the treatment efficiency of the waste gas is ensured, the environmental pollution is reduced, and the printing waste gas is discharged after reaching the standard.
In this embodiment, for guaranteeing the catalytic effect of catalytic box 20, catalytic box 20 is regular hexagon or regular octagon's hollow prism structure, and the both ends of this catalytic box 20 all are equipped with the shrouding. And a plurality of catalytic lamps are arranged on the catalytic box 20, and the catalytic lamps are ultraviolet lamp tubes. Catalysis lamps and lanterns are rectangular shape and follow the length direction extension of polygon prism just locates respectively the edge of polygon prism, the inside interval of catalysis case 20 is equipped with a plurality of catalysis boards 22 uniformly, the outside of catalysis board 22 all coats and has the photocatalysis dope layer, catalysis board 22 is porous structure for the confession waste gas passes through to slow down the velocity of flow of printing waste gas and help printing waste gas and the abundant contact of photocatalysis dope layer. Specifically, in order to facilitate the installation of the catalytic lamp, the catalytic box 20 includes a box body, an edge of the box body is provided with an insertion groove 23, the inner side of the insertion groove 23 is provided with a light-transmitting plate so as to allow ultraviolet light beams to pass through, the catalytic lamp includes a lamp body 24, an installation seat 241 and an insertion plate 242, the installation seat 241 is fixedly connected with the insertion plate 242, and the insertion plate 242 is provided with a conductive seat electrically connected with the lamp body 24, the lamp body 24 is in threaded connection with the installation seat 241 or the lamp body 24 is inserted in the installation seat 241 and is in contact with the conductive seat, so that the lamp body 24 is powered on to emit light. A sliding groove is vertically formed in the side wall of the insertion groove 23, the insertion plate 242 is perpendicular to the installation seat 241, and the insertion plate 242 is slidably installed in the sliding groove, so that the catalytic lamp can be quickly disassembled and assembled. In addition, in order to further catalyze the printing waste gas in the catalytic box 20 quickly, an ozone inlet is also arranged on the catalytic box 20, and the ozone inlet is connected with an ozone generator 31 through an ozone conveying pipe 30. In specific implementation, the organic matters in the printing waste gas are catalytically degraded through ozone and photocatalysis, so that the conversion efficiency is higher, and the treatment effect is better.
In this embodiment, an adsorption component is disposed in the gas collecting channel 10, so as to collect and intercept particles generated in the printing process. Specifically, a step-shaped mounting seat 241 is arranged in the gas collecting hood 10, the adsorption assembly at least comprises a group of metal baskets 12 in a disc shape, filter cotton 121 is filled in the metal baskets 12, and the filter cotton 121 can primarily filter particulate matters. In order to facilitate the disassembly and assembly of the metal basket 12, a connecting lug plate 11 is further arranged on the metal basket 12, and the connecting lug plate 11 is fixedly connected with the gas collecting hood 10 through a bolt.
In this embodiment, the absorption tank 40 absorbs the incompletely converted printing exhaust gas and the converted products by the absorption solution. Specifically, the absorption tank 40 is cylindrical, a liquid collecting tank is arranged at the bottom of the absorption tank 40, absorption liquid is filled in the liquid collecting tank, and the absorption liquid is supplemented and discharged through a liquid inlet pipe and a liquid discharge pipe. In order to facilitate the printing waste gas to be rapidly dispersed in the liquid collecting tank, an air inlet manifold 42 is arranged in the liquid collecting tank, an air inlet end of the air inlet manifold 42 is communicated with the second communicating pipe 21, an air outlet end of the air inlet manifold 42 is connected with an air inlet branch pipe 421, the air inlet branch pipe 421 is annular and is arranged close to the inner wall of the absorption tank 40, a plurality of aeration heads 422 are further arranged on the air inlet branch pipe 421, and the aeration heads 422 can further disperse the printing waste gas to increase the contact surface of the printing waste gas and the absorption liquid, so that the printing waste gas can be absorbed in the liquid collecting tank for the first time. A plurality of flow blocking plates 43 are further arranged in the absorption tank 40, the flow blocking plates 43 are disc-shaped, and the periphery of the flow blocking plates 43 is fixedly connected with the inner wall of the absorption tank 40. The spoilers 43 are parallel to each other and the spoilers 43 are arranged above the air inlet branch pipe 421, the spoilers 43 are horizontally arranged, and air through holes are uniformly distributed on the spoilers 43 at intervals, and the air through holes can further disperse the printing waste gas to promote the printing waste gas to be dispersed again, so that the printing waste gas is favorably absorbed for the second time in the liquid collecting tank. Be equipped with in the absorption tank 40 and spray the mechanism in order to carry out the absorption for the third time to printing waste gas, specifically, it includes annular spraying pipeline 44 to spray the mechanism, be equipped with a plurality of shower heads 441 on the annular spraying pipeline 44, still be equipped with feed pipe 45 on the spraying pipeline, the inlet liquor end of feed pipe 45 is located the bottom of collecting tank and with the collecting tank intercommunication, still be equipped with circulating pump 451 on the feed pipe 45. In specific implementation, the circulation pump 451 operates to make the absorption liquid absorb the printing waste gas for the third time from top to bottom, so as to ensure the treatment effect of the printing waste gas.
In this embodiment, the adsorption tank 50 is filled with a tail gas adsorbent 51 so as to perform final treatment on the printing waste gas subjected to the third absorption, so that the printing waste gas is discharged after reaching the standard, wherein the tail gas adsorbent is a mixture of bentonite and activated carbon or is entirely composed of activated carbon.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the utility model as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (8)
1. A printing waste gas purification system characterized by: the catalytic catalysis device comprises a gas collecting hood (10), a catalysis box (20), an absorption tank (40) and an adsorption tank (50) which are sequentially connected, wherein the gas collecting hood (10) is communicated with the catalysis box (20) through a first communicating pipe (13), the catalysis box (20) is in a polygon prism shape, a plurality of groups of catalytic lamps are arranged on the catalysis box (20), the catalytic lamps are in a long strip shape and extend along the length direction of the polygon prism and are arranged on the edges of the polygon prism, a plurality of catalytic plates (22) are uniformly arranged at the inner interval of the catalysis box (20), the outer sides of the catalytic plates (22) are coated with photocatalytic coating layers, the catalysis box (20) is communicated with the absorption tank (40) through a second communicating pipe (21), a spraying mechanism is arranged in the absorption tank (40), the absorption tank (40) is connected with the adsorption tank (50) through a third communicating pipe (41), and the adsorption tank (50) is filled with a tail gas adsorbent (51).
2. A printing exhaust gas purification system according to claim 1, wherein: the cross section of the catalytic box (20) is a regular hexagon or a regular octagon.
3. A printing exhaust gas purification system according to claim 1, wherein: catalysis case (20) includes the box, all be equipped with inserting groove (23) on the edge of box, the inboard of inserting groove (23) is equipped with the light-passing board, the catalysis lamp includes lamp body (24), mount pad (241) and plugboard (242), mount pad (241) with plugboard (242) fixed connection, just lamp body (24) with mount pad (241) threaded connection or grafting, be equipped with the spout on the lateral wall of inserting groove (23), plugboard (242) slidable mounting in the spout.
4. A printing exhaust gas purification system according to claim 1, wherein: the absorption tank (40) is cylindrical, a liquid collecting tank is arranged at the bottom of the absorption tank (40), an air inlet manifold (42) is arranged in the liquid collecting tank, an air inlet end of the air inlet manifold (42) is communicated with the second communicating pipe (21), an air outlet end of the air inlet manifold (42) is connected with an air inlet branch pipe (421), the air inlet branch pipe (421) is annular and clings to the inner wall of the absorption tank (40), and a plurality of aeration heads (422) are further arranged on the air inlet branch pipe (421).
5. A printing exhaust gas purification system according to claim 4, wherein: still be equipped with a plurality of spoilers (43) in the absorption tank (40), be parallel to each other between spoilers (43) and spoilers (43) are located the top of inlet branch pipe (421).
6. A printing exhaust gas purification system according to claim 4, wherein: the spraying mechanism comprises an annular spraying pipeline (44), a plurality of spraying heads (441) are arranged on the annular spraying pipeline (44), a liquid supply pipe (45) is further arranged on the spraying pipeline, and the liquid inlet end of the liquid supply pipe (45) is arranged at the bottom of the liquid collecting tank and communicated with the liquid collecting tank.
7. A printing exhaust gas purification system according to claim 1, wherein: an adsorption component is arranged in the gas-collecting hood (10).
8. A printing exhaust gas purification system according to claim 7, wherein: be equipped with step-like mount pad (241) in gas collecting channel (10), adsorption component is including being discoid metal basket (12), the inside packing of metal basket (12) has filter pulp (121), still be equipped with on metal basket (12) and connect otic placode (11), connect otic placode (11) through the bolt with gas collecting channel (10) fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122186940.2U CN215962971U (en) | 2021-09-10 | 2021-09-10 | Printing exhaust gas purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122186940.2U CN215962971U (en) | 2021-09-10 | 2021-09-10 | Printing exhaust gas purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215962971U true CN215962971U (en) | 2022-03-08 |
Family
ID=80468849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122186940.2U Expired - Fee Related CN215962971U (en) | 2021-09-10 | 2021-09-10 | Printing exhaust gas purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215962971U (en) |
-
2021
- 2021-09-10 CN CN202122186940.2U patent/CN215962971U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220308 |